19987012

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{409}}^1\times {\mathrm{643}}^1$

素因数の和:1075

約数の個数: 24

約数和(自身を含む): 36965600

約数和(自身を除く): 16978588

約数列:

[1, 2, 4, 19, 38, 76, 409, 643, 818, 1286, 1636, 2572, 7771, 12217, 15542, 24434, 31084, 48868, 262987, 525974, 1051948, 4996753, 9993506, 19987012]

約数ペア:

[(1, 19987012), (2, 9993506), (4, 4996753), (19, 1051948), (38, 525974), (76, 262987), (409, 48868), (643, 31084), (818, 24434), (1286, 15542), (1636, 12217), (2572, 7771)]